Ring threading tool

ABSTRACT

A tool for use in threading an advancing strand through a hole comprising a body member, severing means carried by the body member, a yieldable guide carried by the body member, said guide being biased toward a first position in which it blocks engagement of a strand with the severing means and being movable toward a second position in which it permits engagement of the strand with the severing means, whereby a strand may be engaged with the guide so that tension in the strand tends to urge the guide toward its second position and when the tension in the strand is sufficiently high to overcome the biasing force of the guide, the latter moves to permit the strand to engage and be severed by the severing means.

United States Patent Greenway [54] RING THREADING TOOL [72] Inventor:John Michael Greeuway, Harrogate,

England [73] Assignee: Imperial 21] Appl. No.: 110,846

[30] Foreign Application Priority Data Feb. 5, 1970 Great Britain";..5,592l70 [52] US. Cl. ..57/34 R [51] Int. Cl. ..D0lh 17/00 [58] Fieldof Search ..57/1, 34 R, 34 TT, 52, 53, 57/156; 81/3; 83/909; 223/99 [56]References Cited UNITED STATES PATENTS 2,822,661 2/1958 Farrady et al...57/34 1,959,452 5/1934 Welch ..57/34 TT [451 Oct. 31, 1972 2,572,13810/0195 Griset,Jr. ..57/34TT 2,855,748 10/1958 Baumgarten et a1 ..57/342,949,722 8/1960 Henry et al. ..57/34 Primary Examiner-Werner H.Schroeder Att0mey-Cushman, Darby & Cushman [5 7] ABSTRACT A tool for usein threading an advancing strand through a hole comprising a bodymember, severing means carried by the body-member, a yieldable guidecarried by the body member, said guide being biased toward a firstposition in which it blocks engagement of a strand with the severingmeans and being movable toward a second position in which it permitsengagement of the strand with the severing means, whereby a strand maybe engaged with the guide so that tension in the strand tends to urgethe guide toward its second position and when the tension in the strandis sufficiently high to overcome the biasing force of the guide, thelatter moves to permit the strand to engage and be severed by thesevering means.

7 Claims, 3 Drawing Figures SHEET 1 OF 2 P'A'TEN'TEDnm s 1 m2PA'TENTEDBBI 31 1912 3. 701. 24s

SHEEI 2 OF 2 Home y e RING THREADING TOOL This invention concerns a toolfor threading an advancing strand through a hole such as the ring of aring and traveller wind up mechanism.

According to this invention we provide a threading tool for threading anadvancing strand through a hole comprising strand severing means and ayieldable guide effective to move a strand deflected round the guideinto engagement with the severing means when the tension in the strandround the guide rises to a predetermined value.

Usually when it is required to thread a strand through a hole an end ofthe strand is available. Sometimes however it is required to thread astrand continuously advancing between supply means and collection meansthrough a hole between such supply means and collection means. Such astrand may be deflected through the hole by the yieldable guide of toolaccording to the invention and entrained in a second collection means ata point between the hole and the guide, forming a threadline travellingthrough the hole to the collection means and a loop round the guide andback through the hole, whereby tightening of such loop by the collectionmeans deflects the yieldable guide, moving the loop into contact with asevering means.

For the severing means we prefer to use a single sharpv cutting bladebut other known severing means may be used such as two blades in acuteangled contact, blades moving relatively to each other in cuttingaction, or hot wires or flames.

A convenient collection means is a conventional air suction gun andaspirator device, and conveniently the same suction gun may be used forthe first and second collection means. The apparatus of the inventionmay however be used in conjunction with one or more other collectiondevices such as small mobile driven spindles.

One preferred embodiment of the invention will now be described by wayof example with reference to the drawings accompanying the provisionalspecification in which FIG. 1 is a view of the threading tool partly insection,.

F IG. 2 illustrates the position of the tool of FIG. 1 in use as it isfirst engaged with a threadline, and

FIG. 3 illustrates the position of the tool when the threadline is aboutto be cut.

Referring to FIG. 1, the tool comprises a guide notch 1 in an arm 2pivotally mounted by means ofa pin 3 on one limb of a U-shaped member 4.A spring 5 urges the arm 2 into contact with a recess 6 in the otherlimb of the U-shaped member 4 which is mounted on a rod 8 with a handle9. A blade 7 is attached across the limbs of member 4.

The threading tool illustrated in FIG. 1 may be used in conjunction witha suction gun collection device as illustrated in FIGS. 2 and 3.Referring to FIG. 2, a running threadline 10 is entrained with a suctiongun running threadline through the ring to the suction gun and a loopfrom the suction gun, round the guide notch l and the ring 12, and backto the suction gun. This loop tightens under the suction until. it movesthe yieldable guide and is cut on the blade. The two ends are thencollected by the suction gun.

This method is appropriate for use with a threadline comprisingcontinuous filaments. A threadline comprising only staple fibers haslittle strength before beingtwisted and then the tool of this inventionmay be used in conjunction with a suction gun which also impartssufficient false twist to provide adequate threadline strength to permitoperation of the tool before twist is imparted by thetraveller.

What we claim is:

1. A tool for use in threading an advancing strand through a holecomprising a body member, severing means carried by the body member, ayieldable guide carried by the body member, said guide being biasedtoward a first position in which it blocks engagement of a strand withthe severing means and being movable toward a second position in whichit permits engagement of the strand with the severing means, whereby astrand may be'engaged with the guide so that tension in the strand tendsto urge the guide toward its second position and when the tension in thestrand is sufficiently high to overcome the biasing force of the guide,the latter moves to permit the strand to engage and be severed by thesevering means.

2. A tool as in claim 1 wherein the yieldable guide is constructed torelease the strand as the guide moves toward its second position.

3. A tool as in claim 1 wherein the severing means is a cutting blade.

4. A tool as in claim 1 wherein the yieldable guide is a pivoted springbiased arm.

5. A tool as in claim 1 wherein the yieldable guide is provided with astrand-guiding notch.

6. A tool as in claim 1 wherein said body member includes an elongatedrod, said severing means and said yieldable guide being carried by saidrod near one dnd thereof.

7. A tool as in claim 6 wherein said severing means is a cutting edgefacing generally in a direction along the length of the rod and whereinsaid guide is a pivoted arm which is spring-biased in said direction andinto engagement with stop means carried by the rod.

1. A tool for use in threading an advancing strand through a holecomprising a body member, severing means carried by the body member, ayieldable guide carried by the body member, said guide being biasedtoward a first position in which it blocks engagement of a strand withthe severing means and being movable toward a second position in whichit permits engagement of the strand with the severing means, whereby astrand may be engaged with the guide so that tension in the strand tendsto urge the guide toward its second position and when the tension in thestrand is sufficiently high to overcome the biasing force of the guide,the latter moves to permit the strand to engage and be severed by thesevering means.
 2. A tool as in claim 1 wherein the yieldable guide isconstructed to release the strand as the guide moves toward its secondposition.
 3. A tool as in claim 1 wherein the severing means is acutting blade.
 4. A tool as in claim 1 wherein the yieldable guide is apivoted spring biased arm.
 5. A tool as in claim 1 wherein the yieldableguide is provided with a strand-guiding notch.
 6. A tool as in claim 1wherein said body member includes an elongated rod, said severing meansand said yieldable guide being carried by said rod near one end thereof.7. A tool as in claim 6 wherein said severing means is a cutting edgefacing generally in a direction along the length of the rod and whereinsaid guide is a pivoted arm which is spring-biased in said direction andinto engagement with stop means carried by the rod.